Well, it's not that (game cache - I've installed the game in a new HDD and verified that and played a few maps already, which were the initial ones to be in the subscribed list); P2 is limiting the number of chambers or not loading at all the new subscribed maps. I had a lot of maps on the subscribed list (+-100) and only the initial 15-20 appear now.

I can access to the historic maps list I've played and move them to the queue list on P2, most of them I'd finish or played and appear on white coloured letters (non played yet). Once I got out P2 they are back again in the historic list. None new map appeared yet (2 and half days)